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Most Improved players in K League 1 2026

The most improved players in K League 1 in 2026, ranked on Field Insider.

Most improved goalkeepers in K League 1Most improved defenders in K League 1Most improved midfielders in K League 1Most improved attackers in K League 1Best players in K League 1Most in-form players in K League 1

At a glance

J. Son of FC Seoul is the standout for raw talent across players in K League 1, with a Field Insider Rating of 49.4, and Song Bum-Keun has been the form player this season, grading 35.9, and Cesinha leads the scoring with 8 goals.

The numbers a scout watches are the year-on-year jumps: Song Bum-Keun has improved his Season rating most, up +31.6 on last season, while M. Dackers's scouting Rating has risen fastest, +9.7 over the same span. Those are the players whose trajectory is bending upward fastest.

By our market-value index, Jin Si-Woo of Gwangju FC is the most valuable name in this group at 13.5.

Best talent
J. Son49.4RTG
FC Seoul
In form
Song Bum-Keun35.9SsN
Jeonbuk Motors
Rising potential
M. Dackers+9.7RTG
Daegu FC · 24/25→25/26
Most improved
Song Bum-Keun+31.6SsN
Jeonbuk Motors · 24/25→25/26
Top scorer
Cesinha8goals
Daegu FC
Most valuable
Jin Si-Woo13.5val
Gwangju FC
50 players · ranked by most improvedCustomise →
PlayerTeam
1Song Bum-KeunGoalkeeperJeonbuk Motors28+31.6
24/25→25/26
3688.9%340.6%
2Song Jun-SeokCentre-backGimcheon Sangmu FC25+23.7
24/25→25/26
3126.4%446.6%
3Park Cheong-HyoGoalkeeperGangwon FC36+16.5
24/25→25/26
201.5%137.8%
4HernandesAttacking midfielderDaejeon Citizen27+15.1
24/25→25/26
22228.8%413.8%
5Juan AntonioCentre-backFC Seoul30+15
24/25→25/26
2518.6%2622.6%
6Jo Seong-KwonCentre-backDaejeon Citizen25+14.9
24/25→25/26
182.8%416.4%
7Go Jae-HyeonAttacking midfielderGimcheon Sangmu FC27+13.1
24/25→25/26
193513.5%
8Emerson NeguebaCentral midfielderJeju United FC25+12.7
23/24→25/26
134423.7%
9Kim Jin-GyuCentral midfielderJeonbuk Motors29+12.4
24/25→25/26
163.2%297.2%
10Kim Young-BinFull-backJeonbuk Motors35+11.8
24/25→25/26
23124.5%1327.9%
11Kim Jin-SuCentre-backFC Seoul34+11.1
24/25→25/26
2016.4%1211.3%
12P. KlimalaCentre-forwardFC Seoul28+10.2
23/24→25/26
103230.8%
13Jefferson GalegoCentre-forwardBucheon FC 199529+9.4
24/25→25/26
1467.1%2813.2%
14Kim Tae-HwanCentre-backJeonbuk Motors37+9.1
24/25→25/26
176.7%8±0%
15M. TuciCentre-backGangwon FC27+8.3
24/25→25/26
2331.6%3812.5%
16Lee You-HyeonCentral midfielderGangwon FC29+8.2
24/25→25/26
1515.6%2911.8%
17Choi Woo-JinFull-backJeonbuk Motors22+7.7
24/25→25/26
2046
18Lee Dong-JunCentral midfielderJeonbuk Motors29+7
24/25→25/26
151.4%308.6%
19Lee Hyun-YongCentre-backSuwon City FC22+6.8
24/25→25/26
10212.5%457%
20Gu Sung-YunGoalkeeperFC Seoul32+6.5
24/25→25/26
30611.9%1928.6%
21Lee Gyu-SungCentral midfielderUlsan Hyundai FC32+6.3
24/25→25/26
1392.6%1829.8%
22Kim Jung-HyunDefensive midfielderFC Anyang33+5.9
20/21→25/26
1142.5%120.9%
23Eo Jeong-WonFull-backPohang Steelers27+4.7
24/25→25/26
1514.5%361.1%
24Lee Dong-GyeongAttacking midfielderUlsan Hyundai FC29+4.5
24/25→25/26
2127.9%34±0%
25Kim Ju-KongCentre-forwardDaegu FC30+4.3
24/25→25/26
1351.2%2421.2%
26Lee Jun-SeoGoalkeeperDaejeon Citizen28+3.7
24/25→25/26
7132.1%3112.4%
27Lee Zi-SolCentre-backSuwon City FC27+3.2
24/25→25/26
6123.1%3415%
28Kim Moon-HwanFull-backDaejeon Citizen31+3.1
24/25→25/26
1122.6%201.5%
29Yu In-SooCentre-backJeju United FC31+2.1
24/25→25/26
1546.7%217.9%
30Kim Bong-SooCentral midfielderDaejeon Citizen26+2
24/25→25/26
1220.8%393%
31Yazan Al ArabFull-backFC Seoul30+2
24/25→25/26
177.3%254.3%
32Lee Jae-WonDefensive midfielderSuwon City FC29+2
24/25→25/26
2210%2922.7%
33DerlanCentre-backSuwon City FC30+1.7
21/22→25/26
923.6%1964.7%
34Kim Dong-JinCentral midfielderPohang Steelers23+1.7
24/25→25/26
616.2%42±0%
35Kim Tae-HyunFull-backJeonbuk Motors29+1.6
24/25→25/26
1043.9%270.7%
36Han Chan-HeeCentral midfielderSuwon City FC29+1.4
24/25→25/26
631.8%2621.5%
37Hwang In-JaeGoalkeeperPohang Steelers32+1.4
24/25→25/26
1312%172.8%
38Park Tae-JunCentral midfielderGimcheon Sangmu FC27+1.2
24/25→25/26
1484%342%
39Choi Geon-JooCentre-forwardFC Anyang27+1
24/25→25/26
624.7%342.6%
40Kim Kang-SanCentre-backDaegu FC28+0.5
24/25→25/26
124.3%3417.8%
41Kim Jeong-HoonGoalkeeperFC Anyang25+0.5
24/25→25/26
235.7%412.4%
42Kim Jae-WooCentre-backJeju United FC280
24/25→25/26
930
43Lee Jung-TaekFull-backGimcheon Sangmu FC28-0.3
24/25→25/26
1515.1%311.3%
44Jeong Woo-JaeCentre-backDaegu FC34-0.5
24/25→25/26
223.8%936.5%
45Lee Kun-HeeCentre-forwardGimcheon Sangmu FC28-0.9
24/25→25/26
17152.2%313.7%
46Kim Gyeong-MinCentral midfielderSuwon City FC29-1.1
24/25→25/26
517.7%2623.2%
47Lee Jae-IkCentre-backUlsan Hyundai FC27-1.2
24/25→25/26
529.7%3613.6%
48Patrick WilliamFull-backBucheon FC 199529-1.8
24/25→25/26
911%259%
49K. NishiyaCentral midfielderPohang Steelers26-1.8
24/25→25/26
10113.3%3817.1%
50Park Chan-YongCentre-backPohang Steelers30-1.9
24/25→25/26
121.8%243.5%